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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 33 |
| 3 | 26 |
| 4 | 88 |
| 5 | 230 |
| 6 | 925 |
| 7 | 2516 |
| 8 | 8248 |
| 9 | 27317 |
| 10 | 89074 |
| 11 | 287896 |
| 12 | 945232 |
| 13 | 3089403 |
| 14 | 10093067 |
| 15 | 33056134 |
| 16 | 108135876 |
| 17 | 354125720 |
| 18 | 1159096064 |
| 19 | 3795435852 |
| 20 | 12426659094 |
| 21 | 40688258392 |
| 22 | 133217543175 |
| 23 | 436196336127 |
| 24 | 1428218527996 |
| 25 | 4676315545330 |
[0,33,26,88,230,925,2516,8248,27317,89074,287896, 945232,3089403,10093067,33056134,108135876, 354125720,1159096064,3795435852,12426659094, 40688258392,133217543175,436196336127, 1428218527996,4676315545330] |